Last year a U.S. District Court struck down the Delaware law saying all state court judges must be members of a party entitled to a primary. In Delaware, no party other than the Democratic or Republican Parties has ever been entitled to a primary. Primary parties must have registration of at least 5% of the total.
The Delaware government hopes to persuade the Third Circuit to reverse the U.S. District Court and uphold the law. Here is the opening brief filed by the state. The case is being expedited and all briefs will be filed by August 31.